This is my first trailer, I was inspired by several trailers found on Instructables, picking the best from all of them. I used a corner Aluminium profile, 40x40mm width (1,57 in) and 2mm thick (0,07 in) totally about 8 meters, a square aluminium pipe (40mm width), iron square pipe (30x30mm), tropicalized brackets, rivets, some bolts and nuts. Then I needed 2 16'' front bike wheels, beads (no matter the thickness), screws.
I had to buy more aluminium than needed but the total cost with right quantities is about 50-70 Euro.
as a test, 80 kg, about 175 pounds were smoothly transported. 

Step 1: What is needed

2 x 16'' bike front wheels
4 x 1mt aluminium corner profile - 2 of them with sides cuts at 45°
4 x 80cm aluminium corner profile - 2 of them with sides cuts at 45°
1 x aluminium square pipe (40mm wide)
10 x tropicalized brackets (4 flat 90°, 4 vertical 90°, 2 linear

4 x corner brackets
about 2m of iron square pipe 30mm wide (that replaced the round pipe in the image that was not working good)
beads (I used the 2cm thick ones)
rivets, screws, bolts and nuts
hand made gimbal

<p>Very nice work my friend! Out of curiosity, where did you happen to purchase the bike tires at? I can't seem to find any nearby.</p>
This is excellent trailer plan I like it. Thank you.
awsome! How much does it weigh? Is it tough to pull?
don't know exactly but it's about 25 kg, about 55 pounds, but with an average 18 speed mountain bike it is smooth. I am thinking to change the beads with thinner ones anyway, or find another solution for the sides, i'd like to get below 20 kg (45 lbs).
Nice thanks
Sweet idea :D
Very ingenious.
Thank you all! It means very much to me. As an anticipation, i am working on adding seats for kids, paintwork and led light pack. It'll take a while. stay tuned!
Very nice!
Very good design and painstakingly made, congratulation.
best trailer hitch I've seen for bike trailer! Have one of these stashed in the pile of 'shiny' at work. Will be coming home next week.

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Bio: I live in the south Italy countryside, I have plenty of room to mess up with drill, grinder, saw and other stuff. I'm loving ...
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